raked gravel waves; sand patterns in a rock garden
Specifically refers to the raked patterns in Japanese dry landscape gardens (枯山水).
The raked gravel waves in the rock garden of Ryōan-ji are said to represent flowing water.
ripple mark; sand ripple
Geological term for the wavy patterns formed on sand by wind or water. Also called 風紋 (ふうもん) when formed by wind.
See also: 風紋
The ripple marks on the beach record the movement of the waves.